Pipe tong



p 3- J. A. PETERSON ETAL 2,329,850 v PIPE TONG I Filed Nov. 16. 1940 2Sheets-Sheet l $05.14. PETERSON CARL E OLSEN INVENTORJ- .RTTOEWEK J. A.PETERSON ETAL.

} Sept.'21, 1943.

PIPE TONG Filed Nqv. 16, 1940 2 Sheets-Sheet.2

' JOSJQPEQ CA-RLEDLsEN.

I INVENTOR. aim (3.02M.

Arron/z).

Patented Sept. 21, 1943 32,329,850 PIPE TONG Joseph A.

Peterson and Carl E. Olsen; Houston, Tex.

-. Application'November 16, 1940,'SerialiNo. 365,918

90laims. (oifsiqiij The invention relates to a pipe tong of the typeused in making up and breaking down pipe connections.

The general arrangement of the structure,

jaws, handle and locking device of the present disclosure is the same asthat set out in the patent to J. A. Peterson and Carl E. Olsen,1,857,397 issued May 10, 1932. The presentimprovement;

however, embodies anattachment for the tong wherein the jaws will beextended or moved'to open position so that" they may bemore readilypassed about a pipe. 1

In the previous patent the jaws were normally held retracted by aspring, and it was found that considerable wear on the teeth of the tongresulted in forcing the jaws about a pipe. The present L improvementtherefore contemplates that the jaws may be extended by the operatorjust prior to being passed about the pipe and in this manner the use ofthe tong will be facil-. itated and it can then be lockedin positionabout the pipe as disclosed and prior patent.

It is one of the objects ofthe invention to provide a pipe tong with amechanism for extending the jaws to be passed about the pipe.

contemplated in said Another object .of the invention is to provide apipe tong with a combination locking and extending device which will.extend the jaws when moved to one position and lock them in place whenmoved to another position.

Other and further objects of the invention will be readily apparent whenthe following description is considered in connection with theaccompanying drawings wherein:

Fig. 1 is a side elevation of the tong with part of the handle brokenaway to show the arrangement of the jaws and the operating mechanism.

Fig. 2 is a view similar to Fig. 1 except the jaws are shown as beingextended by the mechanism preparatory to being passed about a pipe.

Fig. 3 is a bottom edge view of the tong.

Fig. 4 is a section taken on the line 4-4 of Fig. 1. I

Fig. 5 is a broken detailed arrangement of the extending finger.

Fig 6 is an enlarged view of the combination locking and extendinglever.

Fig. 7 is a section taken on the line 7-"! of Fig. 6.

Fig. 8 is a side elevation of the entire tong with the jaws in extendedposition.

In Figs. 1 and 8 the tong is shown generally and embodies a handle 2having an enlarged head 3 which is provided with the forked por- -tions4 and 5. This head as seenin Fig. 3 is bifurcated so as to provide theside portions 7 and 8 which are spaced apart.

Eachof' the forked portions carries a' pivot pin 9 upon which the jawsHf and-l2 are pivoted respectively. The jaw H as seen in Fig. 1--isportion I3 a tooth 26 which is arranged to havethe corner 21 thereofprojecting beyond the'face 25 so asarranged for pivoting movement withthe heel disposed in arecess between thesides ,r g v The'jaw 'l2 hasa'slot 16 therein which is ar-- ranged =to receive-the' pin' 'fi. 'Inorder that the jaws'may have slidingmovement'relative to the pin,abearingblock I1 is arranged about the pin 9 and the jaw may slide onthisblock. Thejaw has a recess l8 therein from'whichthe springl9'projects's'o as'to-bear'against the block l1.

A guide rod 28 is disposed within the spring. OneJend of the springbears against the base of the recess 18 and normally tends to force thejaw to the right,"- asseen in Fig. 1-. This jaw'fll has a head 22thereon which is arranged to fit in a socket 23'in' the heel'lB-of thejaw ll so that the jaws are coupledto'gether but are permitted relativepivoting and slidingmove'ment.

The jaw II hasa curvedface 25 which carries to "cut-'intothe surfaceofthe pipe and retain an engagementtherewith." It' should be noted thatthe opening tooth 25 has a roundedbase which in turn receives a halfround key 29 which can be driven place inbehindfthe key to firmly holdthe k'e'yin when the ends thereof are bent over; 9

The jaw l2 has a recess 30 which carries spaced keys 26 so that therewill be a three-point contact with the pipe.

Each of the side pieces I and 8 have a lug 33 projecting therefrom and apivot pin 34 is passed therethrough. Pivoted on this pin is thecombination locking and extending lever 35. The end 36 of this lever isarranged to be engaged by the operator and may be depressed into the.

recess 3'! provided in the handle as seen in Fig. 1, or it may bepivoted in a clockwise direction until the end 36 engages the backportion 38 of the jaw l2.

This lever 35 has a cam portion d0 thereon which is arranged to moveclosely against the surface 4| on the end [3 of the jaw H. These partsare so constructedand arranged that when the cam 40 engages the portion4| of the jaw II that then the heel 13 of the jaw can not move in aclockwise direction. This, of course, prevents the jaw portion II frompivoting and locks 28 which receives the square both of the jawstogether so that the tong will be firmly locked about the pipe.

Fig. 5 shows a finger 45 which is pivoted about the pin 34 and has a lugportion 46 thereon which is arranged to engage a shoulder 41 provided onthe side lever 35. In this manner, as the lever 35 is pressed from theposition of Fig. 1 into the recess 31, the shoulder 41 will move in acounterclockwise direction so as to move the finger portion 48 againstthe head 22 of the jaw l2. In this manner the head will be moved in thedirection of the arrow shown in Fig. 5 so as to extend both of the jawsas seen in Fig. 2. The spring l9 helps to retract on the lever 35 towork the finger 45, must overcome the force of this spring.

A flat spring washer 50 may the pin 34 and between the lug 33 and thelever 35 and held in place by the spring 43 of Fig. 6. .A rivet 5| inthe lug 33 bears against such washer and the washer has a recess 52 overthe rivet and thus hold the lever in locked position. The prong 53punched out of the 'recess 52 serves to clinch the washer 50 to thelever as best seen in Fig. 1. i i

In operation the lever 35imay be depressed as seen in Fig. 2 to extendthe jaws and the tong passed about the pipe. The lever is then releasedso that the jaws move to retracted position and if the lever isthenpivoted over the position shown in Fig. 1 in a clockwise direction thecam 40 will engagethe heel portion 4| of the jaw II and lock both of theportions in position about the pipe.

Broadly, the invention contemplates an attachment for a pipe tong bywhich the position may be extended.

What is claimed is:

1. A pipe tong including a handle, a pair of jaws each pivoted thereon,means to normally hold said jaws retracted, additional means to extendsaid jaws including a lever to overcome said first means, and means onsaid lever to also look said jaws in retracted position.

2. In a pipe tong having a handle and a pair of jaws each pivoted onsaid handle, a leverto lock said jaws in pipe engaging position, andmeans operable by said lever when not in looking position to extend thejaws to be passed about a pipe.

3. A tong having a handle, a jaw pivotally mounted on said handle, a jawpivotally and slidably mounted on said handle, a locking member topositively move said jaws together and the jaws, and the pressure bedisposed about therein to fit,

prevent opening of said jaws, and means also operable by said member tomove said jaws to open position.

4. A tong having a handle, a jaw pivotally mounted on said handle, a jawpivotally and slidably mounted on said handle, a locking member topositively move said jaws together and prevent opening of said jaws, andmeans also operable by said member to move said jaws to open positionwhen said member is moved away from the locking position.

5. A tong having a handle, a jaw pivotally mounted on said handle, a jawpivotally and slidably mounted on said handle, a locking member topositively move said jaws together and preiventopening of said jaws, andmeans also operable by said member to move said jaws to open position,

said last means including a finger piece.

6..A tong having a handle, a jaw pivotally mounted on said handle, a jawpivotally and slidably mounted on said handle, a locking member topositively move said jaws together and prevent opening of said jaws, andmeans also operable by said member to move said jaws to open position,said last means including a finger piece to be moved by said member.

'7. A tong having a handle, a jaw pivotally mounted on said handle, ajaw pivotally and slidably mounted on said handle, a locking member topositively move said jaws together and prevent opening of said jaws, andmeans also operable by said member to move said jaws to open position,said last means including a finger piece to be moved by said member andhaving projecting portions thereon to engage said member and one of saidjaws.

8. In a pipe tong having jaws, a handle, means to pivot each of saidjaws to said handle and to each other, a finger on said handle, means onsaid finger to engage one of said jaws, and a JOSEPH A. PETERSON. CARLE. OLSEN.

